A hypothetical reaction, A₂ +B₂ $\to$ 2AB mechanism as given below;

A₂ $\rightleftharpoons$A+ A          ............(Fast)

A+B₂ → AB + B   ............(Slow)

A+ B → AB         ............(Fast)

The order of the overall reaction is:

1. 2

2. 1

3. 1.5

4. zero

For a non-stoichiometric reaction 2A + B $\to$ C +D, the following kinetic data were obtained in three separate experiments, all at 298 K.

The rate law for the formation of C is:

1. d[C]/dt = k[ A][B]

2. d[C]/dt = k[ A]²[B]

3. d[C]/dt = k[ A][B]²

4. d[C]/dt = k[ A]

In a reaction, the rate expression is, rate = K[A][B]^2/3[C]⁰, the order of the reaction is:

1. 1

2. 2

3. 5/3

4. zero

For the elementary step, (CH₃)_3.CBr(aq) → (CH₃)₃C⁺ (aq) + Br^- (aq), the molecularity is:

1. Zero

2. 1

3. 2

4. Cannot be ascertained

A drop of solution (volume 0.05 mL) contains 3.0 x10^-6 mole of H⁺. If the rate constant of disappearance of H+ is 1.0x10⁷ mol litre sec?. How long would it take for H⁺ in drop to disappear?

1. 6x10^-8 sec

2. 6x10^-7 sec

3. 6x10^-9 sec

4. 6x10^-10 sec